Cleveland (AP) — Victor Oladipo scored 32 points and the Indiana Pacers held off Cleveland’s second-half rally for a stunning 98-80 victory Sunday in Game 1 of the Eastern Conference series, handing LeBron James and the Cavaliers’ their first loss in the opening round in eight years.

Indiana was in control from the outset, opening a 21-point lead in the first quarter and leading by 23 in the third. The Cavs stormed back and got within seven, but Oladipo hit a big 3-pointer and Bojan Bogdanovic helped put Cleveland away with a 3 to make it 88-71.

The Pacers completely outplayed the three-time defending conference champions, whose turbulent regular season has carried over into the playoffs.

Game 2 is Wednesday night.

James scored 24 with 12 assists and 10 rebounds for his 20th career triple-double. But James got little help as Cleveland’s four other starters — Kevin Love, Jeff Green, Rodney Hood and George Hill — combined for 25 points.

This is all new to James, who had won 21 consecutive first-round games and lost a postseason for the first time in his 13th playoffs. The 33-year-old is trying to get to his eighth straight Finals, and already the path is tougher than imagined.

Cleveland had won 14 straight first-round games, last losing on April 22, 2010, the last season of James’ first stint with the Cavs. Indiana was swept by Cleveland in last year’s opening round.

CELTICS 113, BUCKS 107, OT

BOSTON (AP) — Al Horford had 24 points and 12 rebounds and Boston overcame Khris Middleton’s long 3 that beat the fourth-quarter buzzer to top Milwaukee in Game 1 of the Eastern Conference series.

The Celtics led 99-96 with 0.5 seconds left in regulation when Middleton took an inbounds pass on the far right wing and hit a contested 35-footer.

Terry Rozier added 23 points, four rebounds and three assists for Boston in his first career playoff start. Jaylen Brown finished with 20 points, and rookie Jayson Tatum added 19 points and 10 rebounds.

Giannis Antetokounmpo led the Bucks with 35 points, 13 rebounds and seven assists before fouling out in overtime. Middleton had 31 points, eight rebounds and six assists.

Game 2 is Tuesday night in Boston.

THUNDER 116, JAZZ 108

OKLAHOMA CITY (AP) — Paul George scored 36 points to help Oklahoma City beat Utah in Game 1 of the Western Conference series.

George set an Oklahoma City playoff record with eight 3-pointers, blowing past the previous record of five. He made 8 of 11 shots from long range, and 13 of 20 shots overall. It was his first playoff game with the Thunder since being acquired in a trade with Indiana in the offseason.

Russell Westbrook had 29 points, 13 rebounds and eight assists, and Carmelo Anthony added 15 points for the Thunder Jazz rookie Donovan Mitchell had 27 points and 10 rebounds, but he left in the second half with left foot soreness. He returned in the fourth quarter but was noticeably hobbling.